Fix test/fixtures/docker-compose.yaml parse error
Fix test/fixtures/docker-compose.yaml parse error

This is for the master branch (v1.0-alpha has already
been patched)

A parsing error was introduced in an earlier changeset.

FAB-1941

Change-Id: I56d99c812180d1b30554c376e0cf990a11b49602
Signed-off-by: Jim Zhang <6775950e159d0bc2e58935ca2201ba88526dddf0@us.ibm.com>

ratnakar-asara/fabric-sdk-node,ratnakar-asara/fabric-sdk-node,ratnakar-asara/fabric-sdk-node,ratnakar-asara/fabric-sdk-node,adityachap/fabric-sdk-node,adityachap/fabric-sdk-node